From 72db77ae7c3c48f5ea75cd56700436ecb4e1266f Mon Sep 17 00:00:00 2001
From: baldurk <baldurk@baldurk.org>
Date: Thu, 27 Aug 2026 12:43:22 +0100
Subject: [PATCH] Allow inserting tabs at the start of the REPL input

* If there is no non-whitespace input, we shouldn't try to autocomplete
---
 qrenderdoc/Windows/PythonShell.cpp | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/qrenderdoc/Windows/PythonShell.cpp b/qrenderdoc/Windows/PythonShell.cpp
index 70cf2e597..07b65eae8 100644
--- a/qrenderdoc/Windows/PythonShell.cpp
+++ b/qrenderdoc/Windows/PythonShell.cpp
@@ -2229,9 +2229,17 @@ void PythonShell::interactive_keypress(QKeyEvent *event)
     {
       // manually trigger a completion with tab
       case Qt::Key_Tab:
-        m_InteractiveCompleter->activated(
-            m_InteractiveCompleter->popup()->selectionModel()->currentIndex());
-        m_InteractiveCompleter->popup()->hide();
+        // allow prefixed tabs to be inserted
+        if(ui->lineInput->text().trimmed().isEmpty())
+        {
+          ui->lineInput->insert(lit("\t"));
+        }
+        else
+        {
+          m_InteractiveCompleter->activated(
+              m_InteractiveCompleter->popup()->selectionModel()->currentIndex());
+          m_InteractiveCompleter->popup()->hide();
+        }
         return;
       // if a completion is in progress ignore any events the completer will process
       case Qt::Key_Return: